$ git clone -n https://src.fedoraproject.org/rpms/rocksdb.git /var/lib/mock/f45-build-34578-688/root/chroot_tmpdir/scmroot/rocksdb
Cloning into '/var/lib/mock/f45-build-34578-688/root/chroot_tmpdir/scmroot/rocksdb'...
$ git fetch origin 4971a3f3d1c2f727b4e808424be0227b1e708f19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rocksdb
 * [new ref]         4971a3f3d1c2f727b4e808424be0227b1e708f19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4971a3f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild